Just in case Royson doesn't check in soon, his 150/160 is a ONE OFF approval, so won't count for the discussion (if my memory is correct as I don't think the fuel injected engine was an approved mod either). However, I tend to agree with most of the folks here, that one year and one year only...by fluke or design, I don't know....the aircraft did not receive the aerobatic exclusion and was a legal conversion.
